Beading tool



E. w, STEVENS BEADING TooL July 1, 1930,

Filed Sept'. 18, 1.926

2 Sheets-Sheet 1 A TTORNEY.

July 1; 1930.

' E. w. STEVENS 1,769,002

. BEADING T001.

Filed Sept. 18, .1926 2 Sheets-Sheet 2 ATTORNEY.

Patented l, 1930` y 1,7;6aooz TooL coivirA-Nnerrnnwyonx, kn. Y., A compenseren or NEW JERSEY f v i 4Briantne Toon imputation sied september is, 192s. sentirne." 1'3e,'345.

v This invention relates to percussive tools adapted and intended for beading work.

- More specifically it relates to afluid pressure of general application.

percussive toolr developed for beading work f in the construction of automobilebodies, :but certainfeatures ofthe inventionA are capable l:The particular work referred to consists in Vclinching orforcing a bead upon sections of j thernolding strip used onautomobile bodies.

The molding stripcoveisthe4 seam ornieeting portions of the metallic body plates andthe flanged' portions of ftheinolding extend be-` tween "the iianges'of the ibodysections or plates andasuitable.distance beyond. The` extended portions of the molding flanges areV curled over"y the Hangesl of the body sections forthe Vpurpose of drawing the molding up `V tight against 'the bodyv sections; and to" hold 'the latter firmlyin place.` 'lhis-clinching vor curling operation has previously been per-L formed by heavy pressure tools.

v A ,n One object of the invention is to devise a. percussive tool which is lightfin weight and easyto handle for use in cur-ling and beading operations. Another object is'to direct'the d toolfaocurately tothe work. Other objects i will be apparent -`from the detailed descrip@ tion'which follows: j v i n In order to illustratethe inventi'onone concrete embodiment thereof is shown in the accompanying drawings iniwhich:

-Fig l is a vertical, sectional view through when first applied to the work;v y j Fig. 2l 's a view similarvto lrig.` 1 showing tliebeading tool with the parts in the position I the position of the parts' shortly after the opening of the throttle; i Fig. 3 isa fragmentary 'sectional view of the forward end of the tool at the completion oftheworl;V i A F ig. 4 Vis a front or right end elevational View of the tool;

Figi) is a sectional View of therear or left endof the tool indicating tion'for the throttle handle' v i Fig. 6 is a perspective view indicatingY a portion of an `automobile body and showing* the flanges ofthe molding strip before and afterthe beadingoperation. r

a different connec-` v i Gillustrates the-work ltobe performed VSections A and B ofthe sheet steel 'outercov-,j

ering vof an automobile body lare shown with VElm?am) tv .strrnrEivs, erf-Demmin ivricnrsan, AssI'GNoit "ro cHIcAGoiNEnMATIc their flangedp'ortions a and b disposed in ad# jacent parallelism `with the lflangescc yof ai 5 molding strip C extendingtherebetween,` the` rounded head of the molding. strip beingV ar'-,

rangedV to cover'the Yseam lor joint between bodylsections A and B. fAt longitudinal spaced points the ianges cc of the molding ,.60 strip have extended' portions c projecting be-Y yond the flanges a and l) for a suitable i`distance, which Yportions are arranged -*tobe curled or vbeadedoverzinto gripping engage,

nientwith theflanges a and b as indicated at c2, so as to forma-clinch.y The beadingor curling operation draws themolding' strip (l bodyV sections and holds tightly against ythe theparts firmly in place. The flanges a5 5 and` @have registering ybores: Z therethrough,

purpose presently to be described. After the bores cl are utilized for the insertion of rivets more solidly to unite the parts.

Theftoolf' for yperforming the above. indicated beading or curling operation, compris'- curling or beading operationis completedY ing' the-present invention, will nowbel de-y scribed. This tool comprises a casing 7 gen` erallyf-cylindrical in: fornifhaving an axial bore kor chamber 8 with .a reduced opening 8a adjacent the front of the 'casingand at the rear of the casing a transverse bore or chain` ber 9 separated .from chamber 8 by a lpartition having a port l0 therethrough. Casing 7 at the front# end'haslan extension 11 prou vidinof` Va lixedjaw 12carrying afdowel pin 13.v 'j 'pposed'to jaw l2 is a movable jaw 14 carried by a lever 14e, pivotally mounted' ing againsta shoulder on piston Y16y yieldingly urges and holds the piston atthe limit of its inwardmoveinent and jaw in its open po` pneumatichammer unitl8fis slidably disposed within chamber'S of the casing, the

'mA f adjacent 'to theeXtended portions c" for a v- Y Y cylinder 18a :ga the operator grasps throttle of the unit slidably fitting the reduced portion of the bore 8a while the back head 18b slidably fits main bore 8, a cylinder ring 18c insuring a tight connection. An axial el bore 18d in head 18" admits motive Huid `to operate the pneumatic hammer which may be of any suitable or desired type. The piston 18e of the hammer imparts its blows to a die 19, the shank end 19a of-which may be slidably by a throttle leveri23 pivoted at 24, thehandle vbeing attachedto a cap or head 25 secured in the open end of chamber 9. If desired, the throttle handle may :be ydisposed Yin .axial alignment with casing 7, as indicated in Fig. 5, in which case asolidplug 25l 'is used to 5 close the open endof chamber 9 and a passage 26 is .bored in the rear of thecasing to admit `motive Viuid from throttle handle 21 into chamber 9. v

- The operation of the tool is as follows:

casing 7 andpasses the open jaws 12, 14, over the lBanged portions a, Z), c, of assembled body sections' A, B, 'and molding strip C, forcing the dowel pin 13 into one of the bores d and pressing fixed jaw'12 firmly against the flange of section A (Fig. 1). He then opens throttle valve 22 admitting motive fluid tochamber 9 which `forces piston 16 outwardly against spring 17 and causes inward movement of j aw 14 to clamping contact with the ange of body section B. l Outward movement'of piston 16 uncovers bore 10 admitting motive fluid into axial yboreS to force hammer unit 18 outwardly Vagainst the pressure' of its spring i u1 2,7. Spring 17 is weaker than spring 27 in order to effect initial clamping of the work and theV aligning of the'same `with die 19 before the hammer is brought-into action. The

outward movement of the hammer unit brings die V19 into' engagement with the ends of flanged extensions c (Fig.v2) whereupon the motive fluid passing into the hammer through bore 18.c1 sets piston 18e into operation delivering rapid but-light blows to the shank end v19a 23 of die 19. ,The hammer blows accuratelydirected to the work by die 19v quickly curl the extensions c outwardly into the bead or clinch form c2 (Fig. 3) the hammer unit advancing against theftension of spring 27 as the work progressesf Upon closing throttle valve 22 the pressure fluid in chambers 8 and 9 is quickly relievedthrough ventpassages 28 in 'the stem of throttle valve 22. Since spring u 2,7jis .stronger than spring v17,1hammer unity f" 1,8 and piston'l return to their inoperative a received in a bushing 18f. AV retainer ring 18g handle 21 .and

meaoos be understood that the invention is notl limited Y to the specific detailsthereof but covers all changes, modifications and adaptations within the scope ofthe appended claims.

I` claim as my invention:

l. A tool of the class described comprising acasing having a hammer unit slidable therein, a bead forming vdie carried by said hammer unit andmeans accurately direct -g said die tothe work comprising clamping means engaging the same in line with said die, said means being arranged to grip and compress the work in a plane substantially vat right angles of theaxis of said unit. A

. 2. A toolof the class described comprising a casing having a hammer unit slidable therein, a bead Jffnming'die carriedby said 'hammerunia and means accurately directing said die to the work comprising fixed,V and .movable clamping jaws for engaging the work. said fixed-.jaw providing a guide for said die. f

f l3. A'tool of the class described 'compris ing a casing having a hammer unitslidable therein, a beadforining Vdie arranged to be actuated by said .hammer unit and meansv actuated by said hammer unit and means, ac-

curatelf,T directing said die to the work coni-i prising fixedv and movable clamping jaws for engaging the work, said fixed jaw pro'- viding a guide for said die, and a dowel pin on said fixed jaw to engagev an opening in the work.

5. A tool of lthe class described comprising a casing providing a chamber, a hammer unit'slidable in said chamber,.a die tobe operated by said unit, and clamping means for disposing the work in line with said die including an extension on .said casing. and aV member movable substantially at right angles tothe-axis of said die 'toward and away T'rom said'extensiou. i i

6.V Atool of the classdescribed lcomprising a casing providing a chamber, apercussive motor slidable in said. chamber, a die carried by said motor and arranged te be operated by the latter, a xed memberprojecting from said casing and yproviding a guide for said die, and means for clamping the work against said member.v Y

7. A toolV of the class described compris lli) Cil

inga casing `providing a chamber, a hammer unit slidable in said chamber, a` die to Vbe operated by said unit, a fixed member progccting from said casing and providing a guide `:for said die, a dowel pin projecting from said member to engage an opening in the'work, and means for clamping the work against said member. i Y

8. A tool of the class described comprising a casing providing a chamber, a hammer unit slidable lin said chamber,'a'die to bey operated by said unit, and clamping` means movable substantially transverse to the axis mer unit slidable in one chamber, a die to be operated by said unit, clamping means movable at an angle to the axis of said unit Vfor disposing the. work in line with said die, and means in the other chamber for operating said clamping means.

10. A tool of the class described comprising a casing providing two chambers, a pneumaticpercussive motor slidable in one chamber, a die to be operated by said motor,

clamping means for disposing lthe work in line with said die, vand means for operating said clamping means including a. piston in the other chamber.

11. A Huid pressure tool comprising `a cas`- ing, a fixedV jaw projecting fromsaid casing;

for engaging'the work, a movable jaw'pivoted to said casingfor clamping the work to said fixed jaw, aiiuid pressure hammer within said casing having a die movable into contact with thework, and liuid pressure means for actuating yfirst said movable clamping jaw and then said hammer and for releasing the same in the reverse order.

12. Aliuid pressure tool comprisingka. cas? ing, a fixed jaw projecting from said casing for engaging the work, a movable jaw piv- 4the work to said fixed jaw, a piston for actuating said movable jaw, a fluid pressure hammer within saidcasinghaving a die movable into con-` tact with the work, resilient means yieldingly holding both said piston and said hammer in inoperative positions, and means for admitting pressure Huid to operate said piston and said hammer in succession.

' 13. A fluid ing, a'fiXed jaw projecting from said casing for engaging the work, a movable jaw pivoted to said casing for clamping the work to said fixed jaw, a piston for actuating said movable jaw, a fluid pressure hammer witl in said casing Vhavinga die rmovable into Contact with the work, springs yieldingly holding both vsaid piston in inoperative positions, the hammerspring Vtact with the fclampinjg means, means for surefluld tosaidp'iston' chamber, and means l pressure tool comprising a casand said hammer being more powerful than' the piston spring to* insure proper sequence off operation, and

means for admitting pressure fluid to oper#k ate bothsaid `pisto'n'anjdsaidhammer: l 14. A {luidpressure tool comprising a casing,a iiied jaw projecting from said casing for yengaging the work, amovable jaw pivoted Ito `saidl casing to said fixed jaw, a `piston for'actuating said movable jaw, a Huid pressure hammer with-l in said casinghaving a die movable into cona guide for said die,

mit-ting press-ure fluid to operate said andsaid hammer in succession.

` 15. 1A lfluid pressure tool comprising a cas-r ingprovidingtwo chambers, aluid' pressurehammerslidable in one chamber, a diecar# means for chamber and means `'therein' A:into K said hammer chamber Wherebythelworlr is clamped prior to the operation or" said hammer. f'

16. :Afliuid pressure tool comprising a casing providing twochambers, a fluid pressure hammer slidable in one chamber, a die carried by said hammer, clamping means` for disposing the work in line with said die, a piston in the 4other` chamber for actuating said admitting prescont-rolled by said piston for admitting pressure lnidltosaid hammer chamber so that the l workmay be clamped prior to the operation of said-hammer. l

17. A fluid pressure tool comprising a cas ing providing two chambers, a fluid pressure' hammer slidablein one chamber, a die carried by said hammer, clamping means` for disposing the Work in linev with said die, a

' piston-inthe other chamber foractuating said `clamping means,rand means for admitting i 1 pressure fluid to said piston chamber, there being a port between said lchamberscontrolled by said piston. l n

18. Aliuid pressure tool comprising a casing providing two chambers, there beingy a port connecting said chambers, a fluid pressure hammer slidable in one chamber, a die carried by said hammer, a spring' within said chamber engaging said hammer yieldingly to maintain the latter in inoperative position, a projectionon said casing presenting a Xed clamping jaw for the work and a guide for said die, a movable clamping jaw pivoted to said casing, apiston in the other chamber for operatingsaid movable jaw, a spring in said last named, chamber yieldingly maintaining said piston in inoperative position, and a `forclamping the work.y

work; said iiXedy aw providing resilient means yielding ly holding both said piston and saidhammer .in"'inoperative.positions, and Jmeans for adpistonv operating saidl clamping means, and means for admit-i ting pressure fluid lirst to said last 'namedthence under control or the` iso manually (operable throttle ,valvev for controlling the admissionand exhaust of pressure fluid to and from said piston chamber, said piston controllingV the port establishing c communication between saidchambers.

`19. A fluid pressure tool comprising a cas ing providing two chambers, there being a A,

port connecting said chambers, a fluid pressure hammer slidable in one chamber, a die carried byv said hammer, a spring within said chamber engaging said hammer yieldingly to maintain the latter in inoperative position, a projection on said casing presenting a fixed clamping jaw for the work and a said die, a registering the latter with the work, a movablev clamping jaw pivoted to said casing, a piston in the other `chamber forv operating said movable jaw, a spring in said last named chamber yieldingly maintaining said piston in inoperative position, said piston Vspring being weaker thansaid hammer spring to in-V sure proper sequence of operation of said piston and of said hammer, operable throttle valve for controllingthe'admission and exhaust of pressure fluidl to and from said piston chamber, said piston controlling the port establishing communication between said chambers.

20. A tool of the claslsdescribed comprising a casing providing a chamber, a hammer unit slidable in said chamber, a die to be operated by said unit, and clamping means for disposing the Work in lineV with said die in-v cluding an extension on said casing anda pivoted member arranged-for swinging movelment toward and away from said extension. y 21. A tool of the class described comprising` a casing providing a chamber, a hammer unit slidable in said chamber, a die to be operated by said unit, and clamping means for dispos- Ving the work in line with said die including a fixed extensionon said casing and a member pivotally mounted on said casing for swinging movement toward and away from said extension. Y

' Signed by me at Detroit, Michigan, this 30th day of August, 1926.

EDWARD W. STEVENS.

guide for dowel pin on said iiXed jaw for Y and a manually 

